Chuyên đề 5: Energy 1

What type of energy does the windmill use to do work?

• Mechanical

• Nuclear

• Chemical

• Electrical

Fossil fuels such as gas, oil, and coal have what kind of energy?

• Mechanical energy

• Chemical energy

• Electrical energy

• Nuclear energy

A burning candle is in the process of transforming —

• heat energy into chemical energy

• chemical energy into light and heat

• chemical energy into mechanical energy

• chemical energy into nuclear energy

Grass and plants get energy from

• the sun

• eating food

• windmills

• electrons

Potential energy is

• energy that can be destroyed

• energy that can be created

• energy from electrons

• energy that's stored

Nuclear energy could come from

• kicking a soccer ball

• heat inside the Earth

• splitting atoms apart

• solar panels

Which of the following is true of all magnets?

• They are man-made.

• They are made of iron.

• They have two poles and a magnetic field.

• They are magnetic only when an electric charge goes through them.

The ancient Greeks found some metallic rocks that attracted other metallic objects. They called them lodestones . A lodestone is an example of

• a north pole

• a natural magnet

• a man-made magnet

• a non-metallic magnet

Magnetic attraction is a property that makes two magnets stick together. It occurs when

• a magnet is near a nonmagnetic object.

• two magnets' south poles are near each other.

• opposite poles of two magnets are near each other.

• a natural magnet and a man-made magnet are near each other.

Which of the following works because of the Earth's magnetism?

• a compass

• a maglev train

• an electric lock

• a computer chip